Mechanism for controlling loom stop motions



July 28, 1936. J. P. COSTELLO 2,049,356

MECHANISM FOR CONTROLLING LOOM STOP MOTIONS Filed May 2, 1935 a Sheet-Sheet 1 l'ndenzor; Jsephfibsiello,

July 28, 1936. J. P. COSTELLO MECHANISM FOR CONTROLLING LOOM STOP MOTIONS Filed May 2, 1935 5 Sheets-Sheet 2 Indentor: fiSephPCOSZeZZ J6 d aord ..July28, 1936. J. P.COSTEL .I7O 2,049,356

MECHANISMFOR CONTROLLING LOOM STOP MOTIONS lfideniondfisphl? CosZeZZO,

Patented July 28, 1936- PATENT oFFIcE MECHANISM FOR CONTROLLING LOOM STOP MOTIONS Joseph P. Costello, Philadelphia, Pa., assignor to Collins & .Aikman Corporation, Philadelphia, Pa., a corporation of Delaware Application May 2, 1933, Serial No. 669,039

10 Claims. (or lea- '40) My invention is designed to provide means for' controlling the operation of a loom or similar apparatus so that the loom is stopped after a predetermined number of picks, beats, or like operations. My improvements are particularly applicable to double plush looms to stop the loom upon the exhaustion of the yarn cops so as to avoid misweaving or wastage of yarn, orupon the production of a predetermined length of fabric.

My improvements provide means which may be synchronized with weft laying mechanism and operated when a sufiicient number of picks of a member of the loom, having a regular beat,'

such as a sword or feeler motion. The dagger or like device is operable by such loom member to permit the functioning of the usual loom stop Pmotion, such as a switch or belt shifter.

Preferably the dagger mechanism tends normally to move into the path of the 'loom'member, either by gravity or the action of a spring or weight, but is latched or held against such "tendency by latching mechanism, which is normally movable by gravity or a spring into latching position. The latching mechanism may be rocked against its latching tendencythrough the action of a rocker or oscillating device controlled by a cam operable in synchronism :with; the beat of the loom; the rocking device acting through either an electrical train of parts, a mechanical train of parts, or both.'

The characteristic features and advantages of my improvements will more fully appear from the following description and the accompanying drawings of an illustrative embodiment thereof.

In the drawings, Fig. 1 is a top plan view of a portion of the end of a loom having my improved mechanism applied thereto; Fig. 2 is a side elevation of the end of the loom shownin Fig. 1; Fig. 3 is a diagrammatic perspective view of detached parts illustrating the operation of my improved mechanism; Fig. 4 is a detail view of cam and' 'rocker mechanism comprised in my improvements, and Fig. 5 is a detail side elevation of a worm and screw device for operating a cam employed in the loom mechanism.

In the form illustrated my improvements are "applied to a usual form of double shuttle plush loom having a frame I to which is fixed a spring lever 2 connected with a usual stop motion, such as a belt shifter or electric switch (not shown) for disengaging power from the shaft 3, through which ordinary loom mechanisms are driven in theusual manner.

The upper part of the lever 2 is provided with a handle 4 by which it may be shifted in the frame slot 5 into and out of engagement in the notch 6 for holding the lever in the go position.

The lever may also be disengaged from the notch 6 to permit it to spring into the ofi" 13051-7 tion in the slot by an arm or bracket 1 pivotally connected with the frame I. The bracket I is rocked to disengage the lever 2 from the notch 6 by a reciprocatory member of the loom, such for instance, as the lever B which is rocked by-an arm or cam 9 on the shaft 3. The movement of the lever B may be transmitted to the bracket 1 through a dagger I carried by the shaft II journalled in bearings I2 of the bracket 1, and normally tending to move into the plane of the step or contact member I3 on the member 8.

The shaft II has fixed to the end thereof an arm or crank I4 connected, through the adjustable link I5, with an arm I6 pivotally connected with the frame by a pintle I I and the arm or lever I6 is guided and its movement limited by a bracket II connected with the frame.

The lower part of the arm I6 is provided with a cam surface I8 for the engagement of an arm I9 on the oscillatory hub 20. When the hub 20 is turned so that the arm I9 engages the cam surface I8, the arm I6 acts through the link I5, arm I 4 and shaft II to elevate the dagger [0 out of' the path of the step I3. When the hub 20 is turned so that the am Is disengages the cam surface I8, the latter drops and permits the dagger ID to fall into the path of the step I3 so that the arm 'I is rocked and the lever 2 disengaged from the notch 6, with resulting movement of the loom stop motion to stop the machine.

The hub 26 may be oscillated, after a desired number ofpicks have been thrown, either electrically or mechanically or both. The hub 20 has an arm 2| connected by a link 22 with one arm of a bell crank 23 fulcrumed on the frame. The other arm of the bell crank 23 is connected by a link 24 with an arm 25 containing a number of notches or holes for receiving the hooked end of the link 24. The arm 25 is fixed on an oscillatory shaft 26 having thereon the disk 21 havinga cam periphery forming a projecting boss. A dog 28 coacting with a notch in the shaft26 prevents excessive anti-clockwise movement of such shaft.

The disk 21 is movable in a clockwise direction by a knocker 29 pivoted on the pintle 30 and normally drawn in one direction by a spring 3|.

The knocker 29 has pivotally connected therewith a toe piece. 32 for the engagement of the boss on the disk"2 1,'the' point '34o'f "suchtoe piece being normally drawn outwardly by the spring 33 to engage the boss on the disk 21 upon movement of the knocker 29 in one direction. A stop- (not shown) limits the outward movement of the point of the toe piece, which is permitted tomove inward by the expansion of the spring 33 when the knocker 29 is moved towardthe-leftdfiig; 4;) The knocker 29 is moved toward the left against the tension of the spring 3| by a roller or cam "35' fixed on the shaft 36 and rotated in a 'clockwi'se direction in synchronisnr with the operation. of

birrand the widthof the fabric being woven that.

the high; point otthe'cam 35. releases theknocker .29 when the yarn on the bobbin-has been exhaustecl'to the desired extent and consequently the parts. 28,26, 25; 24, .23, 2:2;121', 29, 1.9,, 18-, k6 l5, -l4f,,ll-and. "1- are rocked toeiiect the stopping;

of thevmachine when the-shuttles are in their boxes on the right sideof the loom and the caps on the bobbins substantially exhausted.

.To supplement or supersede the effect -.ofthe blow of the knocker 29 upon the member 2-1,:an

electric eircuit maybe provided containing a.

source of electricity 31,- an electro-magneticccoil 38 and. suitable conductors 39 and 49. Theci-rcuit; may be controlled by the cam 35, as, for

instance, by connecting the conductor 39: with the. conducting ;.to.e=- piece 32 and connecting the conductor 40 with-an insulatedcontact' lll with which the toe 34= momentarily engages at the ammonia. movement to the rig-ht (Fig.4) The closing oflthe circuit causes the electromagnetic coil 38 to actuate its armature; which through the-link. 42, bell crank 43,, Flink 44 and arm 44' oscillates 'thehub 20 onits pivot to'move, the

arniI il 9. outi-rom under the cam I 8.

The cam/3.5 is rotated in-desiredsynchronism-' withithe .operationjof the shuttle .-mechanism or beatiof the, loom. by-aworm wheel 45 meshing with a ,wormfllB onwthe shaft- 41. The shaft 41;

has'fixecll to the. lower end thereof a-worm wheel 48 meshing. withthe. worm 49fixed to the shaft Why the pawl 5.1." which is pivoted on the hub.

43f or. the worm ASfwhi'c'h. is drivenifrom the sha'ftf3 through suitable gearing. The ratchet 50"bein'g integral with the hub 46 of the'worm 49 turns with it and the pawl 53, pivoted on a fixed portion of thefiloom rides idly over it when the loom is weaving forwardly. A collar 52' fixed to the shaft 50 by a set screw limits axial movement of the "worm and ratchet. When the loom is reversed for pickingout or. unweaving, pawl 5| will disengage from shaft 58 and ride over it,

wherea's pawl 53' will engage the teeth 55"of the ratchet 50' and prevent the worm from turning, thereby maintaining the synchronism of the measuringcani andthe length of weft onJthebobbin,'.reg'ardless of' the amountof icking out or unwea'ving.

the timesrequiredifor -one revolution of the cam ."disk "35; or the-gear ratios may be adjusted to haust the yarn on the bobbins. By suitable ad- 5 justments of gear ratios, the operation of. the stop mechanism may be varied to accord with variations in theyardage of yarn onsthe bobbin and the width "of fabric being woven therefrom.

7 In the operations of a loom equipped with my improvements, the yardage placed on the bobbins -will=be-s0 proportioned to the width of the -iiabricxbeing woven that the yarn will be exhausted, after anumber of picks taking place in give the number oi'p'icks required to exhaust the Q'yarn oni the bobbin. during a revolution of the acting Ito-restore the toe'3-2 to its'normal position 1 as. soonaia-s: it. has: passed. the" high point of. the membeni'h. n2:

itheiahighest. point of the ,cam disk 35 passes {the 'bea-ringisurface of the knocker 29, the

latter-is rapidly pulledinz by the spring 3| and J thetoe;:3 2 knocks themember. 27 and r'ocksthe. shaft 26, arm 25, link 24, bell crank: 23', link :22: amtsarnnfi I to turn the .hub: 29 on. its. axis. Simnltaneouslyawith this mechanical actuation of the hub; the knocker-closes the;circuit contain. ing".the;.condnctors z39rand- 40 and. the coil: 38 of the electromagnetis excited-to. actuatenthe armai tureilsf which the link-.42; and, through. the j belhcrank lltizaml' link 414: and arm 414., also tends? to rock thessliuh 2ll*on.:its.pivot. r I ':45

- The rnckingiiof'tl'rezhub moves thezarm l9 from under:the cam.:l:8 of the lever I 6 thereby permittingithe descent iof .theilink l.5,. the rocking: of the shaft It-Ls'and; the: movement :of the dagger l9 intoith fiathkofi'thfifitepftl -The'reciprocation ofthes'latter brings .it into contact with the daggen Hlwandmocksathe arm 1 on its pivot; to dis, engage theiilieveri-z: from its.. notch 6. and permit: the spring: portionqofathelever to -shift it inthe slot 5Jand ithroWthei:fusual loom stop motion, suchi las ail switclr 'or' Joelt. shifter, to. the .off position. i m

As soon as themechanism has-been actuated as ab'ove: ='described the weight of the arm 25 and"its conne'cte'd parts, :or supplemental weight attached-' thereto; restores theinembers to their original positions, so that when the lever 2 is manually {shifted to 'go position and engaged inits notchfi; thestop controlme'chanism is again readyto funetiomuponthe exhaustion of the yarn described my invention; I claim:. lJMhariismfforcontrolling a loom stop mo tion whichcomprises a knocker having a toe member pivotally connected therewith, means, for giving 'aisn'ap action to said knocker; an oscillatory'device; mechanism through which said toe member oscillates; said; device, a dagger, and' means whereby said. oscillatory device operates 2. In apparatus for controlling a loom stop motion just before or upon the exhaustion of a weft supply package, the combination with a cam having an abrupt step, of a knock-off device normally biased in one direction and movable in the opposite direction by the portion of said cam between the foot and head of said step, and means for moving said cam during the laying of a yarn package a distance sufficient to drop said knocker from the head to the foot of said step and including a worm gear preventing reversal of the movement of said cam.

3. In an apparatus for controlling a loom stop motion just before or upon the exhaustion of the weft supply package, the combination of a rotatable member having a cam track with an abrupt step, a knock-01f device normally biased in one direction and moved by the portion of the cam between the foot and head of said step in the opposite direction, said knock-01f device being snapped in its biased direction upon passing over the head of said step, and means for rotating said cam at a rate proportional to a length of yarn in a package and comprising a one way clutch driven in one direction by a loom member and driving in one direction a worm gear through which motion is imparted to said first named rotatable member in one direction only.

4. In apparatus for controlling the stop motion of a loom just before or upon the exhaustion of a weft supply package, the combination of a knock-off device normally biased in one direction and having a contact member yieldable in one direction only, an oscillatory member in the path of said contact member and rocked thereby during the movement of said knock-01f device in its biased direction, and means for moving said knock-off device contra to its biased direction, said contact member yielding to pass said oscillatory member upon the movement of said knockoff device by said means.

5. In a loom having a weft supply package containing a measured length of weft, mechanism for controlling a loom stop motion which comprises a rotatable cam operable in synchronism with the loom mechanism during forward weaving, means for rotating said cam during the running of the loom for weaving and means for latching the rotation eifecting means in inoperative position during unweaving to maintain the synchronism between the measured length of weft, regardless of pick outs or unweaving before exhaustion of the weft package.

6. In a loom having a weft supply package, mechanism for controlling a loom stop motion just before or upon the exhaustion of the weft supply package which comprises a loom member, a dagger movable into and out of the path of the loom member, means for oscillating said dagger comprising an arm having a cam thereon, an oscillatory device movable into and out of engagement with said cam, and means for oscillating said oscillatory device and tending to bias it normally to position for holding said cam in position to hold said dagger out of the path of said loom member, and a cam for oscillating said member against the action of said means last named.

'7. In a loom having a weft supply package mechanism for controlling a loom stop motion just before or upon the exhaustion of the weft supply package which comprises a loom member, a dagger movable into and out of the path of the loom member, means for oscillating said dagger comprising an arm having a cam thereon, an oscillatory device movable into and out of engagement with said cam, and means for oscillating said oscillatory device and tending to bias it normally to position for holding said cam in position to hold said dagger out of the path of said loom member, and a weft measuring cam for oscillating said member against the action of said means last named.

8. Mechanism for controlling a loom stop motion which comprises a loom member, a dagger movable into and out of the path of said loom member, and means controlling said dagger and comprising an oscillatory member, a cam operable oscillating arm, a measuring device comprising a cam for operating said second named 0 member, means for rotating said cam once during a predetermined number of movements of said loom member first named, a circuit controlled by said cam and a link and lever mechanism operable by said oscillatory member.

9. In a loom having a shuttle mechanism, means for controlling a loom stop motion comprising a rotatable cam operable in synchronism with the loom shuttle mechanism, a knocker operable by said cam and having a pivotally connected toe, a spring giving a snap action to said knocker after operations of said knocker by said cam, an oscillatory member, mechanism through which said toe oscillates, said oscillatory member, a dagger, and means whereby said oscillatory member operates said dagger.

10. In apparatus for controlling a loom stop motion just before or upon the exhaustion of a weft supply package, the combination with a cam having an abrupt step, of a knock-off device normally biased in one direction and movable in the opposite direction by the portion of said cam between the foot and head of said step, and means for moving said cam during the laying of a yarn package a distance sufiicient to drop said knocker from the head to the foot of said step and including means preventing reversal of the movement of said cam when the loom is reversed.

JOSEPH P. COSTELLO. 

